Well I am not sure why I feel the need to share, but I'm going to anyway. Just my opinion....
After a long wait on the Helix and much deliberation on the new product, I've decided to move back to the 500 series.
All whilst testing the Helix, I kept asking myself..."is this really worth the $1000.00 more than the 500?" Albeit great tones were achieved in the Helix, I don't feel for me its worth the extra money. I built a pretty extensive library of tones with the 500, and fortunately I still have saved on my pc, that quite frankly I think sound as good if not better than the Helix. Combine the 500 with amp sims and some custom IRs, and I think its a system that has tons of options for tone.
So for me, I'm glad I tried the Helix to see what all of the buzz was about. But my gut says go back, so...that's what I'm doing!